CN108880239B - Multi-port power supply device and operation method thereof - Google Patents
Multi-port power supply device and operation method thereof Download PDFInfo
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- CN108880239B CN108880239B CN201810840703.3A CN201810840703A CN108880239B CN 108880239 B CN108880239 B CN 108880239B CN 201810840703 A CN201810840703 A CN 201810840703A CN 108880239 B CN108880239 B CN 108880239B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
- H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
- H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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Abstract
一种多端口电力供应装置及其操作方法。多端口电力供应装置包括电压源电路、第一电压转换器、第二电压转换器与第一共同控制电路。电压源电路提供源电压。第一电压转换器将源电压转换为第一输出电压，并将第一输出电压输出至多端口电力供应装置的第一连接端口。第二电压转换器将源电压转换为第二输出电压，并将第二输出电压输出至多端口电力供应装置的第二连接端口。第一共同控制电路依据第一连接端口的第一电压需求与第二连接端口的第二电压需求来调整源电压，以提升多端口电力供应装置的电压转换效率。
A multi-port power supply device and an operation method thereof. The multi-port power supply device includes a voltage source circuit, a first voltage converter, a second voltage converter and a first common control circuit. The voltage source circuit provides a source voltage. The first voltage converter converts the source voltage into a first output voltage, and outputs the first output voltage to a first connection port of the multi-port power supply device. The second voltage converter converts the source voltage into a second output voltage, and outputs the second output voltage to a second connection port of the multi-port power supply device. The first common control circuit adjusts the source voltage according to a first voltage requirement of the first connection port and a second voltage requirement of the second connection port to improve the voltage conversion efficiency of the multi-port power supply device.
Description
Technical Field
The present invention relates to a power supply device, and more particularly, to a power supply device having a plurality of connection ports and an operating method thereof.
Background
Generally, when the power supply device provides electric energy to charge the electronic device, the power supply device needs to perform voltage conversion operation according to the charging specification of the electronic device, so that the output voltage of the power supply device meets the required voltage of the electronic device. The power supply device may have a plurality of connection ports to simultaneously supply power to different electronic devices. The power supply device is provided with a plurality of voltage converters so as to respectively supply different output voltages to different connecting ports, and different electronic devices can be respectively connected with the connecting ports of the power supply device so as to receive the output voltages.
The voltage converters of the power supply apparatus commonly use one fixed source voltage to generate different output voltages respectively. The level of the fixed source voltage does not change as the voltage requirements of the ports change. Usually, the level of the fixed source voltage must be very high in order to meet the high voltage requirements of the connection ports. For example, assuming the voltage requirements of the ports fall within the range of 5V to 20V, the constant source voltage level may be 24V. This voltage converter can convert a fixed source voltage (i.e., 24V) to an output voltage (i.e., 20V) when the voltage requirement of the connection port is 20V. However, when the voltage requirement of the connection port is 5V, this voltage converter needs to reduce the voltage from 24V to 5V. Generally, the larger the voltage drop, the lower the voltage conversion efficiency of the voltage converter. When the voltage converter reduces the voltage from 24V to 5V, the voltage conversion efficiency of the voltage converter is reduced, so that the electric energy of the unconverted part is dissipated in the form of heat, and the charger may generate heat.
Therefore, it is necessary to provide a new power supply device to solve the problem of poor voltage conversion efficiency of the conventional power supply device.
Disclosure of Invention
The invention provides a multi-port power supply device and an operation method thereof, which can dynamically adjust a source voltage provided by a voltage source circuit so as to improve the voltage conversion efficiency of the multi-port power supply device.
Embodiments of the present invention provide a multi-port power supply apparatus. The multi-port power supply includes a voltage source circuit, a first voltage converter, a second voltage converter, and a first common control circuit. The voltage source circuit provides a source voltage. The first voltage converter and the second voltage converter are respectively coupled to the voltage source circuit so as to receive the source voltage. The first voltage converter converts the source voltage into a first output voltage and outputs the first output voltage to a first connection port of the multi-port power supply device. The second voltage converter converts the source voltage into a second output voltage and outputs the second output voltage to a second connection port of the multi-port power supply device. The first common control circuit is coupled with the first connection port and the second connection port so as to acquire a first voltage requirement of the first connection port and a second voltage requirement of the second connection port. The first common control circuit correspondingly controls the voltage source circuit according to the first voltage requirement and the second voltage requirement so as to dynamically adjust the source voltage, and further improve the voltage conversion efficiency of the multi-port power supply device.
The embodiment of the invention also provides an operation method of the multi-port power supply device. The operation method of the multi-port power supply device comprises the following steps: providing a source voltage by a voltage source circuit; converting, by a first voltage converter, a source voltage into a first output voltage and outputting the first output voltage to a first connection port of a multi-port power supply device; converting, by a second voltage converter, the source voltage into a second output voltage and outputting the second output voltage to a second connection port of the multi-port power supply device; acquiring a first voltage requirement of the first connection port and a second voltage requirement of the second connection port by the first common control circuit; and the first common control circuit correspondingly controls the voltage source circuit according to the first voltage requirement and the second voltage requirement so as to dynamically adjust the source voltage and further improve the voltage conversion efficiency of the multi-port power supply device.
Based on the above, in the embodiments of the present invention, the multi-port power supply apparatus can obtain the first voltage requirement of the first connection port and the second voltage requirement of the second connection port by the first common control circuit. The first common control circuit can dynamically adjust the source voltage provided by the voltage source circuit according to the first voltage requirement and the second voltage requirement. Therefore, the voltage conversion efficiency of the multi-port power supply device is effectively improved.
In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a circuit block diagram (circuit block) of a multi-port power supply device according to an embodiment of the invention.
Fig. 2 is a flow chart illustrating an operation method of the multi-port power supply apparatus according to an embodiment of the invention.
Fig. 3A to 3B are block diagrams illustrating the first common control circuit of fig. 1 according to various embodiments of the present invention.
Fig. 4A is a schematic circuit block diagram of a multi-port power supply device according to another embodiment of the invention.
Fig. 4B is a circuit diagram illustrating the feedback circuit of fig. 4A according to an embodiment of the invention.
Fig. 5A is a schematic circuit block diagram of a multi-port power supply device according to another embodiment of the invention.
Fig. 5B is a circuit diagram illustrating the feedback circuit and the adjustment circuit of fig. 5A according to an embodiment of the invention.
Fig. 5C is a circuit diagram illustrating the feedback circuit and the adjustment circuit of fig. 5A according to another embodiment of the invention.
FIG. 6 is a block diagram of a multi-port power supply apparatus according to another embodiment of the present invention.
Detailed Description
The term "coupled" as used throughout this specification, including the claims, may refer to any direct or indirect connection. For example, if a first device couples (or connects) to a second device, it should be construed that the first device may be directly connected to the second device or the first device may be indirectly connected to the second device through other devices or some means of connection. Further, wherever possible, the same reference numbers will be used throughout the drawings and the description to refer to the same or like parts. Components/parts/steps in different embodiments using the same reference numerals or using the same terms may be referred to one another in relation to the description.
Fig. 1 is a circuit block diagram of a multi-port power supply device according to an embodiment of the invention. As shown in fig. 1, the multi-port power supply apparatus 100 includes a voltage source circuit 110, a first voltage converter 120, a second voltage converter 130, and a first common control circuit 160. The multi-port power supply device 100 can supply power to different external electronic devices (not shown) through different connection ports (e.g., the first connection port 140 and the second connection port 150 shown in fig. 1). The first connection port 140 and/or the second connection port 150 may be a Universal Serial Bus (USB) connector or other connectors according to design requirements. For example, the first connection port 140 and the second connection port 150 can be a universal serial bus (USB Type-C) connector or a universal serial bus (USB Type-a) connector.
The first common control circuit 160 is coupled to the first connection port 140 and the second connection port 150 to obtain a first voltage requirement D1 of the first connection port 140 and a second voltage requirement D2 of the second connection port 150. For example, in some embodiments, the first common control circuit 160 may be coupled to Configuration Channel (CC) pins of the first connection port 140. The first common control circuit 160 transmits configuration information with an external electronic device (not shown) via the CC pin of the first connection port 140, so as to obtain the voltage requirement of the first connection port 140 (i.e. the voltage requirement of the external electronic device). Similarly, the first common control circuit 160 can be coupled to the CC pin of the second connection port 150 to know the voltage requirement of the second connection port 150 (i.e. the voltage requirement of another external electronic device). According to design requirements, the first common control circuit 160 can support a plurality of USB protocols to meet the transmission requirements of the first connection port 140 and the second connection port 150 with different specifications. For example, when the first connection port 140 or the second connection port 150 is a USB Type-C connection port, the first common control circuit 160 can support a pd (power delivery) protocol. When the first connection port 140 or the second connection port 150 is a USB Type-a connection port, the first common control circuit 160 may support a qc (quick charge) protocol.
In other embodiments, the first common control circuit 160 may be coupled to a power pin (power bus pin, generally designated as Vbus) of the first connection port 140 to measure a voltage of the power pin (the first output voltage Vout1) as a voltage requirement of the first connection port 140. The first common control circuit 160 can also be coupled to the power pin of the second connection port 150, so as to measure the voltage of the power pin (the second output voltage Vout2) as the voltage requirement of the second connection port 150.
The Voltage source circuit 110 may include a Voltage Regulator (Voltage Regulator) or other power supply circuits according to design requirements. The voltage regulator may be a conventional regulator or other voltage regulating circuit/component. The source voltage Vs provided by the voltage source circuit 110 can supply power to the first voltage converter 120 and the second voltage converter 130. The first voltage converter 120 and the second voltage converter 130 are respectively coupled to the voltage source circuit 110 to receive the source voltage Vs. The first voltage converter 120 may convert the source voltage Vs into a first output voltage Vout1 and output the first output voltage Vout1 to the first connection port 140 of the multi-port power supply device 100. For example, the first voltage converter 120 may output the first output voltage Vout1 to a power pin (power bus pin) of the first connection port 140. The second voltage converter 130 may convert the source voltage Vs into a second output voltage Vout2 and output the second output voltage Vout2 to the second connection port 150 of the multi-port power supply device 100. For example, the second voltage converter 130 may output the second output voltage Vout2 to a power pin (power bus pin) of the second connection port 150.
The first common control circuit 160 may control the first voltage converter 120 according to the first voltage requirement D1 of the first connection port 140 to adjust the first output voltage Vout 1. The first common control circuit 160 can also control the second voltage converter 130 according to the second voltage requirement D2 of the second connection port 150 to adjust the second output voltage Vout 2. Therefore, the multi-port power supply apparatus 100 can dynamically adjust the first output voltage Vout1 of the first connection port 140 to meet the voltage requirement of the first connection port 140, and the multi-port power supply apparatus 100 can dynamically adjust the second output voltage Vout2 of the second connection port 150 to meet the voltage requirement of the second connection port 150. According to design requirements, the first voltage converter 120 and/or the second voltage converter 130 may be a boost converter (boost converter), a buck converter (buck converter), a boost-buck converter (buck-boost converter), or other voltage conversion circuits/components.
The first common control circuit 160 can also correspondingly control the voltage source circuit 110 according to the first voltage requirement D1 and the second voltage requirement D2, so as to dynamically adjust the source voltage Vs, thereby improving the voltage conversion efficiency of the multi-port power supply apparatus 100. Assuming that the first voltage converter 120 and the second voltage converter 130 are both buck converters, the first common control circuit 160 may dynamically adjust the source voltage Vs to approach the maximum of the first output voltage Vout1 and the second output voltage Vout 2. For example, assume that the first voltage requirement D1 of the first connection port 140 indicates that the first output voltage Vout1 should be 20V, and the second voltage requirement D2 of the second connection port 150 indicates that the second output voltage Vout2 should be 5V. The first common control circuit 160 may control the voltage source circuit 110 to adjust the source voltage Vs to a voltage close to the first output voltage Vout1 (i.e., 20V), for example, to adjust the source voltage Vs to 24V. Further assume that the first voltage requirement D1 of the first connection port 140 indicates that the first output voltage Vout1 should be 5V, and the second voltage requirement D2 of the second connection port 150 indicates that the second output voltage Vout2 should be 12V. The first common control circuit 160 may control the voltage source circuit 110 to adjust the source voltage Vs to a voltage close to the second output voltage Vout2 (i.e., 12V), for example, to adjust the source voltage Vs to 15V. Let it be further assumed that the first voltage requirement D1 of the first connection port 140 indicates that the first output voltage Vout1 should be 5V, and the second voltage requirement D2 of the second connection port 150 indicates that the second output voltage Vout2 should be 5V. The first common control circuit 160 can control the voltage source circuit 110 to adjust the source voltage Vs to a voltage close to the first output voltage Vout1 (i.e., 5V) and the second output voltage Vout2 (i.e., 5V), for example, to adjust the source voltage Vs to 7V. The first common control circuit 160 can make the source voltage Vs as close as possible to the maximum of the first output voltage Vout1 and the second output voltage Vout2, so as to reduce the loss of power conversion of the voltage converter, thereby improving the voltage conversion efficiency of the multi-port power supply apparatus 100.
Fig. 2 is a flowchart illustrating an operation method of the multi-port power supply apparatus 100 according to an embodiment of the invention. Referring to fig. 1 and 2, in step S200, the voltage source circuit 110 can provide a source voltage Vs to the first voltage converter 120 and the second voltage converter 130, respectively. The first voltage converter 120 may convert the source voltage Vs into a first output voltage Vout1 in step S210 so as to output the first output voltage Vout1 to the first connection port 140 of the multi-port power supply apparatus 100. The second voltage converter 150 converts the source voltage Vs into a second output voltage Vout2 in step S220, so as to output the second output voltage Vout2 to the second connection port 150 of the multi-port power supply apparatus 100.
In step S230, the first common control circuit 160 can detect the voltage requirements of the first connection port 140 and the second connection port 150 to obtain the first voltage requirement D1 of the first connection port 140 and the second voltage requirement D2 of the second connection port 150. In step S240, the first common control circuit 160 may correspondingly control the voltage source circuit 110 according to the first voltage requirement D1 and the second voltage requirement D2, so as to dynamically adjust the source voltage Vs, thereby improving the voltage conversion efficiency of the multi-port power supply apparatus 100.
Fig. 3A to 3B are schematic circuit block diagrams illustrating the first common control circuit 160 of fig. 1 according to various embodiments of the invention. As shown in fig. 3A, the first common control circuit 160 includes a first adc 161, a second adc 162 and a microcontroller 163A. The input terminal of the first adc 161 is coupled to the power pin P1 (power bus pin) of the first connection port 140. The input terminal of the second adc 162 is coupled to the power pin P2 (power bus pin) of the second connection port 150. The first adc 161 can convert the analog voltage of the power pin P1 of the first port 140 into digital data as the first voltage demand D1. The second adc 162 can also convert the analog voltage of the power pin P2 of the second connection port 150 into digital data as the second voltage demand D2.
The microcontroller 163A is coupled to the first adc 161 and the second adc 162 to receive the first voltage requirement D1 and the second voltage requirement D2. The microcontroller 163A controls the voltage source circuit 110 to dynamically adjust the source voltage Vs according to the first voltage requirement D1 and the second voltage requirement D2. Therefore, the first common control circuit 160 can detect the voltages of the power pins P1 and P2 to obtain the first voltage requirement D1 of the first connection port 140 and the second voltage requirement D2 of the second connection port 150, and dynamically adjust the source voltage Vs according to the first voltage requirement D1 and the second voltage requirement D2.
In the embodiment of fig. 3B, the first common control circuit 160 can detect the first voltage demand D1 and the second voltage demand D2 by detecting the CC pin CC1 of the first connection port 140 and the CC pin CC2 of the second connection port 150. For example, as shown in FIG. 3B, the first common control circuit 160 includes a microcontroller 163B. The microcontroller 163B is coupled to the CC pin CC1 of the first connection port 140 and the CC pin CC2 of the second connection port 150 for receiving the first voltage demand D1 and the second voltage demand D2, respectively. In this way, the microcontroller 163B can correspondingly control the voltage source circuit 110 according to the first voltage requirement D1 and the second voltage requirement D2, so as to dynamically adjust the source voltage Vs.
Fig. 4A is a block diagram of a multi-port power supply apparatus 400 according to another embodiment of the invention. The multi-port power supply apparatus 400 of fig. 4A includes a voltage source circuit 110, a first voltage converter 120, a second voltage converter 130, a first common control circuit 460 and a feedback circuit 470. In the embodiment shown in fig. 4A, the first common control circuit 460 is provided with a microcontroller 461. The voltage source circuit 110, the first voltage converter 120, the second voltage converter 130 and the first common control circuit 460 shown in fig. 4A can be analogized with reference to the related descriptions of the voltage source circuit 110, the first voltage converter 120, the second voltage converter 130 and the first common control circuit 160 shown in fig. 1, and thus are not repeated herein.
In the embodiment of fig. 4A, the microcontroller 461 of the first common control circuit 460 is coupled to the feedback circuit 470 of the voltage source circuit 110. The microcontroller 461 can control the voltage division ratio of the feedback circuit 470 according to the first voltage requirement D1 and the second voltage requirement D2. The feedback circuit 470 may convert the source voltage Vs into the feedback information Vfb according to the voltage division ratio. The voltage source circuit 110 may dynamically adjust the source voltage Vs according to the feedback information Vfb.
For example, fig. 4B is a circuit diagram illustrating the feedback circuit 470 of fig. 4A according to an embodiment of the invention. As shown in fig. 4B, the feedback circuit 470 of the voltage source circuit 110 includes a first resistor R1 and a second resistor R2. A first terminal of the first resistor R1 is coupled to the output terminal of the voltage source circuit 110 for receiving the source voltage Vs. A second terminal of the first resistor R1 is coupled to the feedback terminal of the voltage source circuit 110 to provide the feedback information Vfb. The first terminal of the second resistor R2 is coupled to the second terminal of the first resistor R1. A second terminal of the second resistor R2 is coupled to the reference voltage Vref. The level of the reference voltage Vref may be determined according to design requirements. For example, the reference voltage Vref may be a ground voltage or other fixed voltage. Since the multi-port power supply apparatus 400 of fig. 4A is provided with the feedback circuit 470, the microcontroller 461 can change the feedback information Vfb by changing the resistance value of at least one of the first resistor R1 and the second resistor R2 (i.e., changing the voltage division ratio of the feedback circuit 470). Once the feedback information Vfb is changed, the source voltage Vs is changed accordingly. That is, the voltage source circuit 110 can provide the source voltage Vs with different voltage levels according to the feedback information Vfb.
Fig. 5A is a schematic circuit block diagram of a multi-port power supply apparatus 500 according to another embodiment of the invention. The multi-port power supply 500 of fig. 5A includes a voltage source circuit 110, a first voltage converter 120, a second voltage converter 130, a first common control circuit 560, and a feedback circuit 470. The voltage source circuit 110, the first voltage converter 120, the second voltage converter 130, and the first common control circuit 560 shown in fig. 5A can be analogized with reference to the related descriptions of the voltage source circuit 110, the first voltage converter 120, the second voltage converter 130, and the first common control circuit 160 shown in fig. 1, and the feedback circuit 470 and the first common control circuit 560 shown in fig. 5A can be analogized with reference to the related descriptions of the feedback circuit 470 and the first common control circuit 460 shown in fig. 4A, and therefore, the description thereof is omitted.
In the embodiment of fig. 5A, the first common control circuit 560 includes a microcontroller 461 and a regulation circuit 561. The adjusting circuit 561 is coupled to the feedback circuit 470 of the voltage source circuit 110. The adjusting circuit 561 may adjust the source voltage Vs correspondingly by changing the feedback information Vfb of the feedback circuit 470, so that the voltage source circuit 110 adjusts the source voltage Vs correspondingly. The microcontroller 461 is coupled to the adjusting circuit 561. The microcontroller 461 can control the adjusting circuit 561 according to the first voltage requirement D1 and the second voltage requirement D2, so that the adjusting circuit 561 can change the feedback information Vfb of the feedback circuit 470. In this way, the voltage source circuit 110 can correspondingly adjust the source voltage Vs according to the feedback information Vfb.
For example, fig. 5B is a circuit diagram illustrating the feedback circuit 470 and the adjustment circuit 561 of fig. 5A according to an embodiment of the invention. As shown in fig. 5B, the feedback circuit 470 of the voltage source circuit 110 includes a first resistor R1 and a second resistor R2. A first terminal of the first resistor R1 is coupled to the output terminal of the voltage source circuit 110 for receiving the source voltage Vs. A second terminal of the first resistor R1 is coupled to the feedback terminal of the voltage source circuit 110 to provide the feedback information Vfb. The first terminal of the second resistor R2 is coupled to the second terminal of the first resistor R1. A second terminal of the second resistor R2 is coupled to the reference voltage Vref.
In the embodiment shown in fig. 5B, the adjusting circuit 561 includes a variable resistor VR. A first terminal of the variable resistor VR is coupled to the second terminal of the first resistor R1, and a second terminal of the variable resistor VR is coupled to the reference voltage Vref. The microcontroller 461 can change the feedback information Vfb by controlling/changing the resistance of the variable resistor VR. For example, the microcontroller 461 may adjust the resistance of the variable resistor VR high (or low) to change the feedback information Vfb. The voltage source circuit 110 can provide the source voltage Vs with different voltage levels according to the feedback information Vfb.
Fig. 5C is a circuit diagram illustrating the feedback circuit 470 and the adjustment circuit 561 of fig. 5A according to another embodiment of the invention. As shown in fig. 5C, the feedback circuit 470 of the voltage source circuit 110 includes a first resistor R1 and an opto-coupler 471. A first terminal of the first resistor R1 is coupled to the output terminal of the voltage source circuit 110 for receiving the source voltage Vs. The photo coupling assembly 471 has a light emitting portion 4711 and a light receiving portion 4712. For example, the light emitting portion 4711 of the photoelectric coupling assembly 471 may be a light emitting diode, and the light receiving portion 4712 of the photoelectric coupling assembly 471 may be a phototransistor. A first terminal of the light emitting portion 4711 is coupled to a second terminal of the first resistor R1. A first terminal of the light receiving portion 4712 is coupled to the feedback terminal of the voltage source circuit 110 to provide the feedback information Vfb. A second terminal of the light receiving portion 4712 is coupled to a reference voltage Vref.
The adjustment circuit 561 includes a current source 5611. A first terminal of the current source 5611 is coupled to a second terminal of the light emitting unit 4711, and a second terminal of the current source 5611 is coupled to the reference voltage Vref. The control terminal of the current source 5611 is coupled to the microcontroller 461. The microcontroller 461 can change the feedback information Vfb by changing the current value of the current source 5611 (i.e., the amount of current flowing through the light emitting part 4711). The voltage source circuit 110 may correspondingly adjust the source voltage Vs according to the feedback information Vfb. For example, the microcontroller 461 can change the current value of the current source 5611 according to the first voltage requirement D1 and the second voltage requirement D2, thereby changing the feedback information Vfb of the feedback circuit 470, so that the voltage source circuit 110 can provide the source voltage Vs with different voltage levels according to the feedback information Vfb.
Fig. 6 is a circuit block diagram of a multi-port power supply device 600 according to still another embodiment of the invention. The multi-port power supply apparatus 600 of fig. 6 includes a voltage source circuit 110, a first voltage converter 120, a second voltage converter 130, a first common control circuit 160, a third voltage converter 620, and a second common control circuit 660. The voltage source circuit 110, the first voltage converter 120, the second voltage converter 130 and the first common control circuit 160 shown in fig. 6 can be analogized with reference to the related description of fig. 1, and thus are not repeated herein.
In the embodiment of fig. 6, the multi-port power supply device 600 can supply power to different external electronic devices (not shown) through different connection ports (e.g., the first connection port 140, the second connection port 150, and the third connection port 640 shown in fig. 6). The number of connection ports and the number of voltage converters of the multi-port power supply 600 shown in fig. 6 can be adjusted/set according to design requirements. The first connection port 140, the second connection port 150 and/or the third connection port 640 may be USB connectors or other connectors according to design requirements. The second common control circuit 660 is coupled to the third connection port 640, so as to know the third voltage requirement D3 of the third connection port 640. For example, in some embodiments, the second common control circuit 660 may be coupled to the CC pin of the third connection port 640. The second common control circuit 660 transmits configuration information to an external electronic device (not shown) via the CC pin of the third connection port 640, so as to obtain a voltage requirement of the third connection port 640 (i.e., a voltage requirement of the external electronic device). In other embodiments, the second common control circuit 660 may be coupled to the power pin (power bus pin) of the third connection port 640 to measure the voltage of the power pin (the third output voltage Vout3) as the voltage requirement of the third connection port 640.
The third voltage converter 620 is coupled to the voltage source circuit 110 to receive the source voltage Vs. The third voltage converter 620 may convert the source voltage Vs into a third output voltage Vout3 and output the third output voltage Vout3 to the third connection port 640 of the multi-port power supply device 600. For example, the third voltage converter 620 may output the third output voltage Vout3 to a power pin (power bus pin) of the third connection port 640. The second common control circuit 660 may control the third voltage converter 620 according to the third voltage demand D3 of the third connection port 640, so as to adjust the third output voltage Vout 3. Therefore, the multi-port power supply apparatus 600 can dynamically adjust the third output voltage Vout3 of the third connection port 640 to meet the voltage requirement of the third connection port 640. The third voltage converter 620 may be a boost converter, a buck converter, a boost/buck converter or other voltage conversion circuits/components according to design requirements.
Referring to fig. 6, the second common control circuit 660 may further provide the requirement information D3i corresponding to the third voltage requirement D3 to the first common control circuit 160. The first common control circuit 160 may correspondingly control the voltage source circuit 110 according to the first voltage demand D1, the second voltage demand D2 and the demand information D3i, so as to dynamically adjust the source voltage Vs, thereby improving the voltage conversion efficiency of the multi-port power supply apparatus 600.
For example, assuming that the first voltage converter 120, the second voltage converter 130 and the third voltage converter 620 are all buck converters, the first common control circuit 160 can dynamically adjust the source voltage Vs to make the source voltage Vs close to the maximum of the first output voltage Vout1, the second output voltage Vout2 and the third output voltage Vout 3. Assume that the first voltage requirement D1 of the first connection port 140 indicates that the first output voltage Vout1 should be 20V, the second voltage requirement D2 of the second connection port 150 indicates that the second output voltage Vout2 should be 12V, and the third voltage requirement D3 of the third connection port 640 indicates that the third output voltage Vout3 should be 5V. The first common control circuit 160 may control the voltage source circuit 110 to adjust the source voltage Vs to a voltage close to the first output voltage Vout1 (i.e., 20V), for example, to adjust the source voltage Vs of the voltage source circuit 110 to 24V. Further assume that the first voltage requirement D1 of the first connection port 140 indicates that the first output voltage Vout1 should be 5V, the second voltage requirement D2 of the second connection port 150 indicates that the second output voltage Vout2 should be 5V, and the third voltage requirement D3 of the third connection port 640 indicates that the third output voltage Vout3 should be 12V. The first common control circuit 160 may control the voltage source circuit 110 to adjust the source voltage Vs to a voltage close to the third output voltage Vout3 (i.e., 12V), for example, to adjust the source voltage Vs to 15V. The first common control circuit 160 can make the source voltage Vs as close as possible to the maximum of the first output voltage Vout1, the second output voltage Vout2, and the third output voltage Vout3, so as to reduce the loss of power conversion of the voltage converter, thereby improving the voltage conversion efficiency of the multi-port power supply apparatus 600.
In summary, in the embodiments of the invention, the multi-port power supply apparatus can obtain the first voltage requirement of the first connection port and the second voltage requirement of the second connection port by the first common control circuit. The first common control circuit can dynamically adjust the source voltage provided by the voltage source circuit according to the first voltage requirement and the second voltage requirement. Therefore, the voltage conversion efficiency of the multi-port power supply device is effectively improved.
Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.
List of reference numerals
100. 400, 500, 600: multi-port power supply device
110: voltage source circuit
120: first voltage converter
130: second voltage converter
140: first connection port
150: second connecting port
160. 460, 560: a first common control circuit
161: a first analog-to-digital converter
162: second analog-to-digital converter
163A, 163B, 461: micro-controller
470: feedback circuit
471: photoelectric coupling assembly
561: adjusting circuit
620: third voltage converter
640: third connecting port
660: second common control circuit
4711: light emitting part
4712: light receiving part
5611: current source
CC1, CC 2: configuration channel pin
D1: first voltage requirement
D2: second voltage requirement
D3: third voltage requirement
D3 i: demand information
P1, P2: power pin
R1: a first resistor
R2: second resistance
S200 to S240: method step
Vfb: feedback information
Vout 1: first output voltage
Vout 2: second output voltage
Vout 3: third output voltage
VR: variable resistor
Vref: reference voltage
Vs: source voltage
Claims (16)
1. A multi-port power supply comprising:
a voltage source circuit for providing a source voltage;
a first voltage converter coupled to the voltage source circuit for receiving the source voltage, wherein the first voltage converter converts the source voltage into a first output voltage and outputs the first output voltage to a first connection port of the multi-port power supply device;
a second voltage converter coupled to the voltage source circuit for receiving the source voltage, wherein the second voltage converter converts the source voltage into a second output voltage and outputs the second output voltage to a second connection port of the multi-port power supply device; and
the first common control circuit is coupled to the first connection port to obtain a first voltage requirement of the first connection port, and coupled to the second connection port to obtain a second voltage requirement of the second connection port, wherein the first common control circuit correspondingly controls the voltage source circuit to dynamically adjust the source voltage according to the first voltage requirement and the second voltage requirement, so that the source voltage approaches to the maximum of the first output voltage and the second output voltage, thereby improving the voltage conversion efficiency of the multi-port power supply device.
2. The multi-port power supply of claim 1 wherein the first common control circuit controls the first voltage converter to dynamically adjust the first output voltage according to the first voltage requirement, and the first common control circuit controls the second voltage converter to dynamically adjust the second output voltage according to the second voltage requirement.
3. The multi-port power supply of claim 1 wherein the first common control circuit comprises:
a first analog-to-digital converter having an input terminal coupled to a power pin of the first connection port, wherein the first analog-to-digital converter converts an analog voltage of the power pin of the first connection port into a digital data as the first voltage requirement; and
a microcontroller coupled to the first adc for receiving the first voltage requirement, wherein the microcontroller controls the voltage source circuit to dynamically adjust the source voltage according to the first voltage requirement and the second voltage requirement.
4. The multi-port power supply of claim 1 wherein the first common control circuit comprises:
a microcontroller coupled to a configuration channel pin of the first connection port for receiving the first voltage requirement, wherein the microcontroller controls the voltage source circuit to dynamically adjust the source voltage according to the first voltage requirement and the second voltage requirement.
5. The multi-port power supply of claim 1 wherein the first common control circuit comprises:
a microcontroller coupled to a feedback circuit of the voltage source circuit, wherein the microcontroller controls a voltage division ratio of the feedback circuit according to the first voltage requirement and the second voltage requirement, the feedback circuit converts the source voltage into a feedback information according to the voltage division ratio, and the voltage source circuit dynamically adjusts the source voltage according to the feedback information.
6. The multi-port power supply of claim 5 wherein the feedback circuit of the voltage source circuit comprises:
a first resistor, wherein a first terminal of the first resistor is coupled to an output terminal of the voltage source circuit for receiving the source voltage, and a second terminal of the first resistor is coupled to a feedback terminal of the voltage source circuit for providing the feedback information; and
a second resistor, wherein a first terminal of the second resistor is coupled to the second terminal of the first resistor, a second terminal of the second resistor is coupled to a reference voltage,
wherein the microcontroller changes the feedback information by changing the resistance of at least one of the first resistor and the second resistor.
7. The multi-port power supply of claim 1 wherein the first common control circuit comprises:
the voltage source circuit is coupled with a feedback circuit of the voltage source circuit, wherein the adjusting circuit is used for changing feedback information of the feedback circuit, and the voltage source circuit correspondingly adjusts the source voltage according to the feedback information; and
and the microcontroller is coupled with the adjusting circuit and controls the adjusting circuit according to the first voltage requirement and the second voltage requirement so as to adjust the source voltage.
8. The multi-port power supply of claim 7 wherein the feedback circuit of the voltage source circuit comprises:
a first resistor, wherein a first terminal of the first resistor is coupled to an output terminal of the voltage source circuit for receiving the source voltage, and a second terminal of the first resistor is coupled to a feedback terminal of the voltage source circuit for providing the feedback information; and
a second resistor, wherein a first terminal of the second resistor is coupled to the second terminal of the first resistor, a second terminal of the second resistor is coupled to a reference voltage,
the adjusting circuit comprises a variable resistor, a first end of the variable resistor is coupled to the second end of the first resistor, a second end of the variable resistor is coupled to the reference voltage, and the microcontroller changes the feedback information by changing the resistance value of the variable resistor.
9. The multi-port power supply of claim 7 wherein the feedback circuit of the voltage source circuit comprises:
a first resistor, wherein a first terminal of the first resistor is coupled to an output terminal of the voltage source circuit to receive the source voltage; and
a photoelectric coupling component having a light emitting portion and a light receiving portion, wherein a first end of the light emitting portion is coupled to a second end of the first resistor, a first end of the light receiving portion is coupled to a feedback end of the voltage source circuit to provide the feedback information, and a second end of the light receiving portion is coupled to a reference voltage;
the adjusting circuit comprises a current source, a first end of the current source is coupled to a second end of the light-emitting part, a second end of the current source is coupled to the reference voltage, a control end of the current source is coupled to the microcontroller, and the microcontroller changes the feedback information by changing the current value of the current source.
10. The multi-port power supply of claim 1 wherein the first and second voltage converters comprise buck converters.
11. The multi-port power supply of claim 1, wherein the first connection port and the second connection port comprise a type C universal serial bus connection port or a type a universal serial bus connection port.
12. The multi-port power supply of claim 1 further comprising:
a third voltage converter coupled to the voltage source circuit for receiving the source voltage, wherein the third voltage converter converts the source voltage into a third output voltage and outputs the third output voltage to a third connection port of the multi-port power supply device; and
the second common control circuit is coupled to the third connection port to obtain a third voltage requirement of the third connection port, wherein the second common control circuit provides a requirement information corresponding to the third voltage requirement to the first common control circuit, and the first common control circuit controls the voltage source circuit to dynamically adjust the source voltage according to the first voltage requirement, the second voltage requirement and the requirement information, so as to improve the voltage conversion efficiency of the multi-port power supply device.
13. A method of operating a multi-port power supply, comprising:
providing a source voltage by a voltage source circuit;
converting the source voltage into a first output voltage by a first voltage converter so as to output the first output voltage to a first connection port of the multi-port power supply device;
converting the source voltage into a second output voltage by a second voltage converter so as to output the second output voltage to a second connection port of the multi-port power supply device;
obtaining a first voltage requirement of the first connection port and a second voltage requirement of the second connection port by a first common control circuit; and
the first common control circuit correspondingly controls the voltage source circuit according to the first voltage requirement and the second voltage requirement to dynamically adjust the source voltage so that the source voltage approaches the maximum of the first output voltage and the second output voltage, thereby improving the voltage conversion efficiency of the multi-port power supply device.
14. The method of operation of claim 13, further comprising:
the first common control circuit controls the first voltage converter to dynamically adjust the first output voltage according to the first voltage requirement; and
the first common control circuit controls the second voltage converter to dynamically adjust the second output voltage according to the second voltage requirement.
15. The method of claim 13, wherein the first connection port and the second connection port comprise a type C usb connection port or a type a usb connection port.
16. The method of operation of claim 13, further comprising:
converting the source voltage into a third output voltage by a third voltage converter to output the third output voltage to a third connection port of the multi-port power supply device; and
a second common control circuit acquires a third voltage requirement of the third connection port; and
providing a requirement information corresponding to the third voltage requirement to the first common control circuit by the second common control circuit,
the first common control circuit controls the voltage source circuit to dynamically adjust the source voltage according to the first voltage requirement, the second voltage requirement and the requirement information, so as to improve the voltage conversion efficiency of the multi-port power supply device.
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| CN110289662B (en) * | 2019-02-13 | 2021-09-21 | 威锋电子股份有限公司 | Multi-port power supply device and operation method thereof |
| CN112083783B (en) * | 2019-06-13 | 2022-03-29 | 贸联国际股份有限公司 | Expansion device and charging management method thereof |
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| WO2014051610A1 (en) * | 2012-09-28 | 2014-04-03 | Ever Win International Corporation | Usb charging system |
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| US8232674B2 (en) * | 2008-07-31 | 2012-07-31 | Astec International Limited | Multiple output isolated DC/DC power converters |
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| WO2014051610A1 (en) * | 2012-09-28 | 2014-04-03 | Ever Win International Corporation | Usb charging system |
| US9825531B2 (en) * | 2013-07-10 | 2017-11-21 | Infineon Technologies Austria Ag | Post-regulated flyback converter with variable output stage |
| CN203660617U (en) * | 2014-01-23 | 2014-06-18 | 颜真 | Charging wire used for USB single-port input multiport output |
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